Why can't they make the iphone battery last more than one day.

Bought the iphone 3g to use for email - hey I'm a sucker for a pretty boxes.

I've had it for about six months - it has sat in it's cradle for most of the time.

Had cause to take it on the road yesterday (to listen to Microsoft tell me how great Windows 7 is gonna be!)

Anyway the useless lump of plastic was telling me the battery was about to run out - after about 18 hours on standby and ten minutes of calls.

Searching on the internet it appears this is the same for everyone. Not really a very useful business product - what a poor show. Looks great - works for a day then it's useless.